[Speex-dev] echo cancellation on PDA

[Jean-Marc Valin]

>> Are you by any chance using an insane sampling rate and/or tail length.
>> Try a sampling rate of 8000 Hz, 128-sample frame size and 1028-sample
>> tail length.
> In my appliation, the sampling rate is 8000 Hz, and time stamp is
> 20ms, doesn't it mean I should initialize echo_state like
> speex_echo_init_state(160,n*160)?

That's fine -- as long as n is reasonable, let's say in the order of 8.
Are you using just the echo canceller or the preprocessor too (try just
the echo canceller).

	Jean-Marc